Tamerhashem

Any help please ?

I have updated my xbox from 17489 to 17559, and all went well, but when i download the update file "$System update" changed the S with $ ..and put it with usb drive ... I get the pop message update ... When i pressed "yes" during the extracting process i got update failed message .

please help

my console is corona .. xbox 360 elite 250 gb with rgh 

Thank you in advance